Diablo III (SQ)

Beta Requirements

The beta requirements are:

PC

• OS: Windows® XP/Windows Vista®/Windows® 7 (Latest Service Packs) with DirectX® 9.0c
  Processor: Intel Pentium® D 2.8 GHz or AMD AthlonTM 64 X2 4400+
  Video: NVIDIA® GeForce® 7800 GT or ATI Radeon™ X1950 Pro or better
  

Mac

• OS: Mac® OS X 10.6.8 or newer
  Processor: Intel® Core 2 Duo
  Video: NVIDIA® GeForce® 8600M GT or ATI Radeon™ HD 2600 or better
  

All Platforms

• HD Space: 12 GB available HD space
  Memory: 1 GB RAM (1.5 GB required for Windows Vista®/Windows® 7 users, 2 GB for Mac® users)
  Drive: DVD-ROM drive
  Internet: Broadband Internet connection
  Display: 1024×768 minimum display resolution

(Note: Be advised that some wireless connections do not meet the minimums required to be a true Broadband Internet connection. Wireless results may vary.)

RECOMMENDED SYSTEM SPECIFICATIONS

PC

• OS: Windows Vista®/Windows® 7 (Latest Service Packs)
  Processor: Intel® Core 2 Duo 2.4 GHz
  or AMD AthlonTM 64 X2 5600+ 2.8 GHz
  Memory: 2 GB RAM
  Video: NVIDIA® GeForce® 260 or ATI Radeon™ HD 4870 or better

Mac

• OS: Mac® OS X 10.7 or newer
  Processor: Intel® Core 2 Duo
  Memory: 2 GB RAM
  Video: NVIDIA® GeForce® GT 330M or ATI Radeon™ HD 4670 or better

sumber : http://diablo.wikia.com/wiki/Diablo_III